Relevant bibliographies by topics / Railway substructure

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Railway substructure'

Author: Grafiati
Published: 4 June 2021
Last updated: 10 February 2022

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Journal articles on the topic "Railway substructure"

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Habashneh, Muayad. "Special reinforcement solutions of railway permanent ways’ soil substructures." Acta Technica Jaurinensis 14, no. 3 (May 21, 2021): 339–63. http://dx.doi.org/10.14513/actatechjaur.00612.

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This mini review aims to summarize relevant international publications. Thus, based on this, giving a comprehensive review about the reinforcement solutions of permanent ways' soil substructure. Generally, the core weakness of soil is its inadequacy to resist tensile stresses. The main target of strengthening the soil is to enhance the engineering characteristics of the soil to build up specific parameters such as shear strength, compressibility, density, and hydraulic conductivity. In addition, special reinforcement techniques of railway permanent ways' soil substructures will be considered in this paper due to the increasing demand of improving railways and rehabilitation process. The main findings of this study that there are a lot of special reinforcement techniques which can be considered as effective solution for soil stabilization such as geosynthetic reinforcement.
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Li, Wei, Xuecheng Bian, Xiang Duan, and Erol Tutumluer. "Full-Scale Model Testing on Ballasted High-Speed Railway: Dynamic Responses and Accumulated Settlements." Transportation Research Record: Journal of the Transportation Research Board 2672, no. 10 (July 13, 2018): 125–35. http://dx.doi.org/10.1177/0361198118784379.

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High-speed trains generate much higher vibrations in track structures than conventional trains and intensive train passages (e.g., on the Beijing–Shanghai high-speed railway line where the train passage interval is less than 5 minutes) cause accumulated permanent settlement in the railway track substructures, which will decrease track performance and jeopardize the safety of trains. Since very few field measurements on ballasted high-speed railways are available in literature, this paper presents experimental results of vibration velocity, dynamic soil stress, and the accumulated settlement of a ballasted high-speed railway from a full-scale model testing facility with simulated trains moving loads at various speeds. A portion of a realistic ballasted railway consisting of track structure, ballast layer, subballast, embankment, and piled foundation was constructed in a larger box. An eight-actuator sequential loading system was used to generate equivalent vertical loadings on the track structure for simulating the dynamic excitations due to train movements. Dynamic stresses measured in the track substructure layers (ballast, subballast, and embankment) were found to be strongly dependent on train speeds especially for speeds higher than 144 km/h. It was found that both the vibration velocity and the dynamic soil stress were greatly amplified as the train speed increased to 300 km/h, and the ballast layer effectively reduced the vibrations transmitted from the track structure to underlying soil. The accumulated settlement of the substructure did not reach a stable state even after 100,000 moving train loads at a speed of 300 km/h.
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IŽVOLT, Libor, Peter DOBEŠ, and Juraj PIEŠ. "Verification of boundary conditions of numerical modeling of the track substructure thermal regime – influence of the snow cover." Archives of Transport 4, no. 48 (December 31, 2018): 51–60. http://dx.doi.org/10.5604/01.3001.0012.8365.

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The initial part of the paper briefly characterizes a long-term experimental activity at the Department of Railway Engineering and Track Management (DRETM). The research of the DRETM focuses, besides other research activities and specific problems in the field of railway engineering (application of new structures and construction materials in conventional and modernized railway tracks, modernisation and rehabilitation of existing railway tracks for higher speeds, track diagnostics, influence of track operation on noise emissions and design of structural measures, possibility of application of recycled ballast bed material in the track substructure, ballast recycling technologies, ecological assessment of recycled material of the track substructure), on various factors affecting track substructure freezing. In 2012-2017, in the campus of the University of Žilina (UNIZA), an Experimental stand DRETM was built for the research purposes. The experimental stand DRETM consists of 6 types of track substructure placed in an embankment or a cut, in the 1:1 scale. Besides conventional building materials (crushed aggregate), these structures also include various thermal insulation materials (Liapor concrete, Styrodur, foam concrete). A significant part of the paper deals with numerical modeling of the freezing process of track substructure (an embankment with the embedded protective layer of crushed aggregate, fr. 0/31.5 mm) for various boundary conditions (air frost index, average annual air temperature), using SoilVision software. The aim of this research is to identify the thermal insulation effects of different thicknesses of snow cover on the depth of penetration of the zero isotherm into the track substructure (railway track). The paper conclusion specifies the influence of different snow cover thicknesses, or nf factor (factor expressing the dependency between the mean daily air temperature and the temperature on the ballast bed surface) and various climatic conditions (frost indexes and average annual air temperatures), affecting the railway infrastructure, on the resulting depth of freezing of the track substructure (railway track). These outputs will be in the further research used for the design of nomogram for determining the thickness of the protective layer of the frost-susceptible subgrade surface of the track substructure.
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Fei, Jianbo, Yuxin Jie, Chengyu Hong, and Changsuo Yang. "Comparative Analysis of Design Parameters for High-Speed Railway Earthworks in Different Countries and a Unified Definition of Embankment Substructure." Baltic Journal of Road and Bridge Engineering 15, no. 2 (June 25, 2020): 127–44. http://dx.doi.org/10.7250/bjrbe.2020-15.476.

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This paper compares design specifications and parameters for high-speed railway (HSR) earthworks in different countries (i.e., China, France, Germany, Japan, Russia, Spain and Sweden) for different track types (i.e., ballasted and ballastless), and for different design aspects (i.e., HSR embankment substructure, compaction criteria, width of the substructure surface, settlement control, transition section, and design service life). Explanations for differences in HSR implementation among different countries are provided and reference values of the design parameters are obtained. In an attempt to unify different types of HSR substructures around the world, a widely applicable definition of the stratified embankment substructure based on the practices adopted in different countries is proposed. The functions and requirements of each functional layer (i.e., the blanket layer, frost protection layer and filtering layer) are summarized.
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Dobeš, Peter. "Calibration of TDR Test Probe for Measuring Moisture in the Body of the Railway Substructure and its Subgrade." Civil and Environmental Engineering 11, no. 2 (December 1, 2015): 84–94. http://dx.doi.org/10.1515/cee-2015-0011.

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Abstract In the introduction of the paper there is characterized a way of monitoring the moisture in the railway substructure in the experimental stand, which is a part of the experimental workplace of the Department of Railway Engineering and Track Management. A substantial part of the paper is devoted to the calibration of TDR test probe for selected rock materials as a basic prerequisite for the determination of the actual moisture in the body of the railway substructure and subgrade.
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Lewandrowski, Tomasz, Paweł Muzolf, and Włodzimierz Idczak. "The approximate modelling of a “rail vehicle-railway track- substructure” system." Bulletin of the Military University of Technology 66, no. 2 (July 3, 2017): 107–21. http://dx.doi.org/10.5604/01.3001.0010.1893.

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A system “railway vehicle–railway track–substructure” was analysed. Rails were modelled as the Bernoulii-Euler beams on an elastic foundation. Two load cases were considered a) static load from the train to the railway track, b) dynamic load from the train moving with the constant velocity. As a result, the fourth-order differential equation was obtained. Both, material data and operating parameters were determined by components of the equation. To solve this equation, the finite difference method was used. This method was described considering such matters as space step, time step, discretization, and moving load modelling. Evaluation of usefulness of a selected method in modelling a railway infrastructure was the purpose of the authors. The obtained results were compared with results received by analytical way. The presented, simplified model: railway vehicle–infrastructure–substructure after appropriative validation will be used later on to analyse various technical solutions and materials in designing railway constructions. Keywords: numerical methods, finite difference method, railway infrastructure, dynamic impact factor
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Haji Abdulrazagh, Parisa, and Michael T. Hendry. "Case study of use of falling weight deflectometer to investigate railway infrastructure constructed upon soft subgrades." Canadian Geotechnical Journal 53, no. 12 (December 2016): 1991–2000. http://dx.doi.org/10.1139/cgj-2016-0083.

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Falling weight deflectometer (FWD) testing was conducted along with embankment and subgrade sampling over 210 km (130 miles) of Canadian National Railway’s Lac La Biche Subdivision, which runs between Edmonton and Fort McMurray, as a part of a larger investigation of the line for increased axle loads. The resulting measurements were evaluated for their ability to identify soft subgrades. Two analyses were conducted to this end. First, the statistical distribution of peak deflections recorded by the FWD was investigated for different types of subgrade material. Second, the properties of track substructure were studied by characterizing the deflection time histories using a dynamic model of a single mass on a viscoelastic foundation and least-squares curve fitting. Four characteristic types of deflection time histories were identified for differing substructure conditions. Simplified dynamic modelling of railway track substructure showed that where relatively thick embankment exists over subgrade, the response of track is overdamped behavior.
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Vukićević, Mirjana, Zdenka Popović, Jovan Despotović, and Luka Lazarević. "Fly ash and slag utilization for the Serbian railway substructure." Transport 33, no. 2 (December 12, 2016): 389–98. http://dx.doi.org/10.3846/16484142.2016.1252427.

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Approximately 7 million tons of fly ash and slag are produced in thermal power plants in Serbia every year, only 3% of which is used in the cement industry. About 300 million tons of the ash-slag mixture are disposed in landfills, occupying an area of approximately 1600 hectares and generating environmental issues. Fly ash from Serbian power plants has pozzolanic properties and due to low concentration of calcium compounds (less than 10% CaO), they do not have self-cementing properties. According to the ASTM C618-15, this ash is from class F. According to the European Standard EN 197-1:2011, this ash is siliceous (type V) ash. From April 2014 to May 2015, an investigation of engineering properties of fly ash and mixtures of fly ash and slag from landfill (without or with binders of cement/lime) was conducted at the Laboratory of Soil Mechanics at the Faculty of Civil Engineering of the University of Belgrade (Serbia) and at the Institute for Testing of Materials – IMS Institute in Belgrade. The laboratory test results were showed in the study ‘Utilization of fly ash and slag produced in the TPP JP EPS thermal power plants for construction of railways’. Four kinds of waste materials from Serbian power plants were laboratory tested: (a) an ash-slag mixture from landfills at the ‘Nikola Tesla A’ thermal power plant; (b) fly ash from silos in the ‘Nikola Tesla B’ thermal power plant; (c) an ash-slag mixture from landfills at the ‘Kostolac A’ and ‘Kostolac B’ thermal power plants and ‘Srednje kostolačko ostrvo’ landfill; (d) fly ash from the ‘Kostolac’ thermal power plant. The following physical and mechanical properties of ash and mixtures were investigated: grain size distribution, Atterberg limits, specific gravity, moisture-density relationship, shear strength parameters in terms of effective stresses, California Bearing Ratio (CBR), and deformation parameters. The paper presents the results of laboratory tests of the materials with and without binders, and based on the laboratory results and previous research, the paper presents possibilities of using fly ash and slag for the construction of railway substructure in the planned construction and reconstruction of railway network in Serbia. The obtained results indicate that tested fly ash and ash-slag mixture have met the technical requirements and that they have the potential to be used in railway substructure.
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Lazarević, Luka, Dejan Vučković, Milica Vilotijević, and Zdenka Popović. "Application of seismic tomography for assessment of the railway substructure condition." Structural Health Monitoring 18, no. 3 (May 29, 2018): 792–805. http://dx.doi.org/10.1177/1475921718774778.

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This article presents results obtained in the research conducted on railway infrastructure in Serbia, which aimed at prediction of substructure condition based on the analysis of track quality. It presents the results of seismic tomography application as non-destructive procedure for assessment of railway substructure condition. Track geometry quality was assessed according to analysis of longitudinal level data, which was recorded during regular track geometry inspections. Track section for application of seismic tomography was chosen on the basis of analysed track geometry data recorded during the regular track geometry inspections in 2006, 2008, 2009, 2012, 2013 and 2014. Tomographic imaging of railway platform on Test Section enabled the creation of two-dimensional finite element model, which was used for determination of propagation speed of seismic P-waves. Seismic tomography on Test Section, which is the part of the international railway line Belgrade–Vrbnica, was performed in 2014. Obtained tomographic image was discussed and compared to track geometry data recorded during the regular track geometry inspections.
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Mosayebi, Seyed-Ali, Jabbar-Ali Zakeri, and Morteza Esmaeili. "Vehicle/track dynamic interaction considering developed railway substructure models." Structural Engineering and Mechanics 61, no. 6 (March 25, 2017): 775–84. http://dx.doi.org/10.12989/sem.2017.61.6.775.

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Dissertations / Theses on the topic "Railway substructure"

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Kennedy, Justin. "A full-scale laboratory investigation into railway track substructure performance and ballast reinforcement." Thesis, Heriot-Watt University, 2011. http://hdl.handle.net/10399/2431.

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To reduce railway track maintenance costs and meet the growing demand for rail travel the railway industry needs to significantly increase the performance of old existing tracks and design any new tracks accordingly. In this thesis, a new full-scale laboratory Geopavement & Railway Accelerated Fatigue Testing (GRAFT) facility at Heriot-Watt University is developed to study the performance of both unreinforced and reinforced railway track substructure systems. The new GRAFT facility enables accelerated testing of full-scale railway tracks and innovative railway products under realistic railway loading conditions. The unreinforced track systems represent typical railway tracks in the UK while the reinforced track systems represent sections of track implemented with various geosynthetic products. GRAFT consists of a track constructed within a steel tank. The track comprises a 750mm clay subgrade layer overlain by a clay formation layer overlain by a 300mm ballast layer. The track includes three hardwood sleeper sections overlain by an I-section steel beam which has similar stiffness properties to a BS 113 A rail section. Cyclic loading is applied to the track from a hydraulic testing machine with the centre sleeper directly under the loading actuator. The loading mechanism replicates a repeated quasi static single wheel load on the central sleeper of one half of a 3m long section of railway track. Based on the results found from the testing programme in GRAFT empirical relationships are developed between the unreinforced track performance in terms of track settlement and stiffness and the subgrade modulus, applied load and number of applied cycles. These relationships fit the GRAFT data presented in this thesis well and it is thought that they could be used (tentatively) to estimate track settlement on track after tamping/ballast renewal/new track. These relationships are shown to be consistent with other well known track settlement models and they indicate that subgrade stiffness and applied vertical load are two of the most significant parameters that influence track substructure deterioration. The results found from the reinforced track tests quantify the improvement in track performance available with each product under various track conditions. Two ballast ii reinforcement products have been tested; XiTRACK reinforcement and geocell reinforcement, along with a reinforced geocomposite used primarily for separation at the ballast/subgrade interface. In addition, a geocomposite product designed to replace a traditional sand blanket, used on the tracks where severe subgrade erosion conditions prevail, has been tested in GRAFT under flooding conditions. The most significant results show that XiTRACK reinforcement can considerably improve the performance of railway tracks while the performance of the track implemented with the sand blanket replacement product indicates that currently a traditional sand blanket with a geotextile separator is the recommended option for tracks with subgrade wet spots. From all the data recorded empirical settlement models are proposed for each of the geosynthetics compared for reinforcement purposes. These models form the basis for reinforced track design graphs that could potentially be used to form part of an initial cost-benefit analysis of different track reinforcement techniques considered for improving track performance and reducing maintenance. In order to use the track settlement design graphs developed within this thesis (in the field) a reliable measure of subgrade stiffness needs to be made on track. A reliable insitu measuring device could enhance railway site investigations. Several in-situ measuring devices that could potentially be used to measures subgrade stiffness and strength in the field have been tested within GRAFT. The devices studied include the Dynamic Cone Penetrometer (DCP), Light Falling Weight Deflectometer (LFWD), Pocket Penetrometer and Proving Ring Penetrometer. The accuracy of these devices is compared to Plate Load Tests (PLT) and unconfined compression strength tests and suggestions towards the use of such devices on track made. The results indicate that the DCP has the potential to be a quick and accurate in-situ measuring device for railway track site investigations. The GRAFT facility and the results found in GRAFT have been validated using a basic static 3D FE computer model termed SART3D (Static Analysis of Railway Track 3D). The program has been calibrated to GRAFT by modifying the FE mesh for the dimensions of GRAFT and inputting the GRAFT track properties. The validated results from this thesis have direct practical implications to the railway industry in terms of iii design recommendations on how best to investigate and improve key geotechnical parameters that influence railway track performance and hence reduce maintenance costs and extend asset life. A review of current design procedures used in the railway industry is given and a new design procedure is suggested to reduce track maintenance and offer an optimised design and maintenance strategy.
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Sangirieva, Irina. "The design of an overpass crossing on railway in Mirny, Arkhangelska Oblast, Russia." Thesis, KTH, Bro- och stålbyggnad, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-90319.

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Bridge design and construction practice in former USSR, especially Russia, is not much known to the foreign engineers. Many advanced structural theories and construction practices have been established. In 1931, Franklin D. Roosevelt said, “There can be little doubt that in many ways the story of bridge building is the story of civilization. By it, we can readily measure a progress in each particular country.” The development of bridge engineering is based on previous experiences and historical aspects. Certainly, the Russian experience in bridge engineering has its own specifics. Bridge design proceeds in accordance with local standards and specifications. This study considers the basic rules and standards in bridge design in the North of Russia, the work includes the overview of Russian design concepts. The paper shows the design of typical concrete bridges including all calculations and analyses for future bridge stability and also drawings for visualisation. The results of the work are conclusions based on performing the required design calculations, drawings, preparing a final estimate and preparations for the construction. There are also some notes concerning the Russian design systems, computer programs for designing and computing and, finally, comparison of the Russians design standards and the Eurocode.
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Yamaguchi, Teruya. "Synthesised H∞ıµ control design for a dynamically substructure system and it's application to railway testing facilities." Thesis, University of Bristol, 2017. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.723510.

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RADAMPOLA, Senanie Sujeewa, and senanie s. radampola@mainroads qld gov au. "EVALUATION AND MODELLING PERFORMANCE OF CAPPING LAYER IN RAIL TRACK SUBSTRUCTURE." Central Queensland University. Centre for Railway Engineering, 2006. http://library-resources.cqu.edu.au./thesis/adt-QCQU/public/adt-QCQU20060817.115415.

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In the design of rail track structures where the subgrade cannot achieve the desired capacity, enabling the required standard of track geometry to be maintained for the speed, axle load and tonnage to be hauled, a capping layer of granular material is placed between the natural ground or the embankment fill material and the ballast to protect the underlying weaker layers. In spite of the important role played by the capping layer, very little research has been carried out on its performance. The current practice of design of the capping layer, therefore, is based on working stress philosophy where reduced levels of stresses are assumed not to degrade the subgrade. Even on tracks containing a thick ballast layer that ensures allowable levels of working stress the subgrade has been found to have permanently deformed. Design of capping layers based on plastic deformation, therefore, appears appropriate. This thesis aims at determining the load levels that cause detrimental plastic deformation in the capping layer. The suite of material properties that characterise plastic deformations of capping layer is neither readily available nor easily determined. This thesis proposes a cheaper method of evaluating a range of capping layer material properties using penetration tests on specimens contained in California Bearing Ratio (CBR) test moulds coupled with a finite element modelling based back calculation technique. The suite of material properties thus determined are used for the simulation of the behaviour of capping layers under the boundary and loading conditions similar to those in practice. The predicted results are validated using laboratory experiments on large size capping layer specimens.
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Syrový, Aleš. "Návrh rekonstrukce železniční stanice Horní Cerekev." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392112.

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The subject of the diploma thesis is to design a redevelopment of railway station Horni Cerekev, in order to meet current traffic and legislation on access of persons with reduced mobility. Two platforms with the platform edge height of 550 mm above the top of the rail have been designed. The amount of five running tracks through the station remains unchanged. Furthermore, the railway superstructure, railway substructure and conceptual design of space in front of the station.
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Lehnert, Jan. "Návrh zvýšení traťové rychlosti v úseku mezi žst. Hanušovice a žst. Bludov." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227559.

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In this thesis I propose increasing of the speed on the railway line No. 292 on the section žst.Bludov - žst. Hanušovice. It includes is complete design of horizontal and vertical ratios, eventually relocation of the track. Railway substructure is solved in selected sections. The thesis solves also editing of platforms and crossing structures.
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Filo, Martin. "Rekonstrukce železniční stanice Chrudim." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227775.

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The subject of the diploma thesis is to design a redevelopment of railway station Chrudim in order to meet current legislation on access of persons with reduced mobility. Two platforms with the platform edge height of 550 millimetres above the top of the rail have been designed. The amount of four running tracks through the station remains unchanged. Furthermore, the railway superstructure, railway substructure and the new drainage system was also designed.
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Málek, Jiří. "Návrh modernizace železniční stanice Valašské Meziříčí." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-239996.

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The theme of this thesis is to design modernization of Valašské Meziříčí Railway Station. This thesis includes reconstruction of both station heads and the design of the platforms for the safe movement of persons with reduced mobility with seven platform edges in total. The thesis deals with the construction of the railway superstructure and substructure, including drainage.
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Svrček, David. "Porovnání technologií rekonstrukce traťové koleje." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409757.

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This diploma thesis is focused on design and comparison of open line track procedures of work between stations Hranice na Moravě město and Hustopeče nad Bečvou. Subject is reconstruction of railway superstructure and substructure in kilometrage 7,785 598 to 15,016 545 (except section 8,173 463 to 8,700 000) of track n°1. The target of the thesis is to optimize open line track procedures by variation of technologies and mechanization.
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Duong, Trong Vinh, and Trong Vinh Duong. "On the hydro-mechanical behavior of ancient railway flatforms in term of reinforcement by soil-mixing." Phd thesis, Université Paris-Est, 2013. http://pastel.archives-ouvertes.fr/pastel-00945680.

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The present work deals with the behavior of ancient railway sub-structure in France. A statistical study was firstly undertaken on problems occurred in the whole ancient French railway network. The analysis evidenced the particular importance of sub-grade quality for the performance of the sub-structure and the track geometry. Afterwards, an ancient railway line in the West of France was investigated. The analysis showed that the degradation speed of this line was correlated with different parameters such as the nature of sub-grades and the thickness of different layers. An increase trend of degradation speed with the increase in interlayer thickness was identified. The interlayer has a positive impact since it reduces the train-induced stress applied to the sub-grade. The hydro-mechanical behavior of interlayer soil under different conditions (water content, fines content, stress, number of cycles) was investigated. A set of triaxial tests and infiltration tests were performed for this purpose. By analyzing the shear strength properties, the permanent axial strain and the resilient modulus of interlayer soil, we found that the water content and the fines content must be considered together. Adding more fines into the interlayer presents a positive impact under unsaturated conditions thanks to the suction effect, but a negative impact under saturated conditions. The infiltration column tests with drying/wetting cycles showed that the hydraulic conductivity of interlayer soil is governed by fines fraction but did not change significantly with fines content. In order to study the mechanism of interlayer creation and mud pumping, a physical model of 550 mm inner diameter was developed. Soil samples representing the ancient French railway substructure with a ballast layer overlying an artificial silt layer (mixture of crushed sand and kaolin were tested. The effects of monotonic and cyclic loadings, water content and dry unit mass of sub-soil were investigated. It was found that the pore water pressure developed in the sub-soil and the sub-soil stiffness are the key factors for the migration of fine particles or the creation of interlayer/mud pumping. Water is the necessary condition, but it is the soil compressibility that governs the phenomenon to occur
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Books on the topic "Railway substructure"

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Elkins, J. A. Interaction of Railway Vehicles with the Track and Its Substructure. CRC Press LLC, 2018.

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Elkins, J. A. Interaction of Railway Vehicles with the Track and Its Substructure. CRC Press LLC, 2018.

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Elkins, J. A. Interaction of Railway Vehicles with the Track and Its Substructure. CRC Press LLC, 2018.

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Elkins, J. A. Interaction of Railway Vehicles with the Track and Its Substructure. CRC Press LLC, 2018.

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Herbertov Workshop on Interaction of Railway Vehicles with the Track and its Substructure (3rd 1994 Herbertov, Czech Republic). Interaction of railway vehicles with the track and its substructure: Proceedings of the 3rd Herbertov Workshop on ... Swets & Zeitlinger, 1995.

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Book chapters on the topic "Railway substructure"

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Hackl, Klaus, Johannes Kirchhofer, and Josef Fink. "Investigation and Simulation of Dynamic Behaviour of Railway Bridges with Ballast Substructure." In The Eight International Conference "Bridges in Danube Basin", 235–44. Wiesbaden: Springer Fachmedien Wiesbaden, 2013. http://dx.doi.org/10.1007/978-3-658-03714-7_17.

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Dobeš, Peter, Libor Ižvolt, and Stanislav Hodás. "Examining the Influence of Railway Track Routing on the Thermal Regime of the Track Substructure – Experimental Monitoring." In Advances in Intelligent Systems and Computing, 201–9. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-35543-2_16.

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"Substructure." In Railway Geotechnics, 89–144. CRC Press, 2015. http://dx.doi.org/10.1201/b18982-5.

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Wang, Ping. "Design of Rail Substructure and Components." In Design of High-Speed Railway Turnouts, 275–303. Elsevier, 2015. http://dx.doi.org/10.1016/b978-0-323-39617-2.00009-6.

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Náprstek, J. Ř. Í., and Ladislav Frýba. "Stochastic Modelling of Track and its Substructure." In Interaction of Railway Vehicles with the Track and its Substructure, 297–310. Routledge, 2018. http://dx.doi.org/10.1201/9780203750490-23.

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Grassie, Stuart L. "Track Deflections and Macroscopic Movement of Railway Embankment." In Interaction of Railway Vehicles with the Track and its Substructure, 154–63. Routledge, 2018. http://dx.doi.org/10.1201/9780203750490-13.

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Moravčík, Milan. "Response of Railway Track on Nonlinear Discrete Supports." In Interaction of Railway Vehicles with the Track and its Substructure, 280–93. Routledge, 2018. http://dx.doi.org/10.1201/9780203750490-22.

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Okstad, E. "RAMS processes in railway-substructure engineering for improved project quality." In Advances in Safety, Reliability and Risk Management, 2724–30. CRC Press, 2011. http://dx.doi.org/10.1201/b11433-388.

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Knothe, Klaus. "Past and Future of Vehicle/Track Interaction." In Interaction of Railway Vehicles with the Track and its Substructure, 3–6. Routledge, 2018. http://dx.doi.org/10.1201/9780203750490-1.

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Mauer, Lutz. "Determination of Track Irregularities and Stiffness Parameters with Inverse Transfer Functions of Track Recording Vehicles." In Interaction of Railway Vehicles with the Track and its Substructure, 117–32. Routledge, 2018. http://dx.doi.org/10.1201/9780203750490-10.

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Conference papers on the topic "Railway substructure"

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Olhoeft, Gary R., and Ernest T. Selig. "Ground-penetrating radar evaluation of railway track substructure conditions." In Ninth International Conference on Ground Penetrating Radar (GPR2002), edited by Steven Koppenjan and Hua Lee. SPIE, 2002. http://dx.doi.org/10.1117/12.462264.

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Esmaeili, M. H., M. Naeimi, B. Soltani, and M. Afsartaha. "Reducing Slab Track Vibrations by Using Asphalt Concrete in the Substructure." In 2016 Joint Rail Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/jrc2016-5766.

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Vibrations of the slab track system propagated to the environment are estimated for railway tracks in which substructures are made from hot mix asphalt concrete (HMAC) and/or rubber modified asphalt concrete (RMAC). Sensitivity analysis is done to determine the ability of such layers to reduce vibrations with various frequencies, load amplitude and thicknesses of asphalt layers. Different types of substructures i.e. with or without the concrete base layer are used to assess propagated vibrations caused by the moving train. A finite element (FE) model of the ballast-less track substructure is built and the dynamic analysis is performed for various track models with asphalt layers. The FE model is in principle a two-dimensional plane-strain model with the parameters according to the common slab track systems. Ground vibrations i.e. dynamic accelerations are extracted at different recording points around the track with lateral distances 0, 10 and 20m from the loading axis. The outputs of numerical simulations for different substructure models are obtained and the possibilities of vibration reductions by various methods are discussed.
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Taiyin, Zhao, and Zhou Zhengou. "Railway Substructure Lacuna Detection Using a Forward-Looking SAR GPR." In 2006 CIE International Conference on Radar. IEEE, 2006. http://dx.doi.org/10.1109/icr.2006.343196.

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Kolos, Alexey, Andrei Petriaev, and Anastasia Konon. "Study on railway elastic substructure vibration under heavy axle load." In PROCEEDINGS OF THE SCIENTIFIC CONFERENCE ON RAILWAY TRANSPORT AND ENGINEERING (RTE 2021). AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0063961.

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Laskowska, Ewa, and Jørn Vatn. "Degradation modelling of railway infrastructure." In IABSE Congress, Christchurch 2021: Resilient technologies for sustainable infrastructure. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2021. http://dx.doi.org/10.2749/christchurch.2021.0935.

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<p>In this paper the Wiener process with linear drift is proposed as a degradation model for the railway substructure. The model is based on the empirical data describing loss of tracks quality over the distance of one kilometre. The impact of explanatory variables on tracks degradation is investigated. The Bayesian framework is applied to examine uncertainty in the development of degradation for different sections along the tracks.</p>
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Sussmann, Theodore R., and James P. Hyslip. "Track Substructure Design Methodology and Data." In 2010 Joint Rail Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/jrc2010-36232.

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Track substructure design is an often overlooked step in the design of railroad track. The lack of consideration for the substructure when designing track results in greater maintenance demands due to inadequate track substructure performance. Railway track is a stable structure with a progressive failure process that allows track engineers to manage the degradation of the track through maintenance. However, increasing demands for track availability from high traffic volumes require that track maintenance be minimized while ensuring safety. Additionally, developing high speed rail and intercity passenger rail on existing corridors necessitates higher levels of substructure performance due to tighter track roughness tolerances. Reduction in maintenance needs can be achieved by ensuring that new construction and rehabilitation projects be designed to provide a stable track structure throughout the design life. Lack of readily available data for substructure materials is a drawback to the use of track design methods. This paper provides a summary of several available substructure track design methods along with the required data for design. The track design data is related to track measurements that could be used to determine much of the information necessary for design of track rehabilitation. Track load-deflection data could be used to develop much of the needed design data while ground penetrating radar could support delineation of similar track segments. Benefits of track structure design include knowledge of expected life, reduced maintenance, material properties for quality control, and development of material properties that could permit application of performance based contract specifications.
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Rohrman, A. K., H. F. Kashani, and C. L. Ho. "Influence of Fouling and Water Content of Ballast on Railway Substructure Bearing Capacity." In 2017 Joint Rail Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/jrc2017-2286.

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The performance of ballasted railway systems is commonly compromised by the infiltration of fine material into the voids of the ballast. This sand and finer grained materials in the ballast is known as fouling. Increased fouling can cause decreases in hydraulic conductivity and shear strength of the ballast, as well as reduce stiffness and resilient modulus of the overall track system. These problems can cause gradual deterioration of the track, which could eventually require maintenance. One of the largest source of fouling comes from ballast breakdown resulting from abrasion caused under repeated loading. This study aims to investigate the effects of fouling from ballast breakdown on the bearing capacity of the substructure that supports the rail superstructure. Previous investigations at the University of Massachusetts Amherst utilized large scale 10-inch (25.4 cm) diameter triaxial tests on granitic ballast with fouling from ballast breakdown. The tests were run with fouling contents of 0% (clean ballast), 15%, and 30% and at water contents varying from dry ballast to field capacity. Confining pressures of 5 psi (34.5 kPa), 10 psi (68.9 kPa) and 15 psi (103.4 kPa) were used in this series of tests. Using the results from these tests, the Mohr-Coulomb strength properties can be determined for each case. This study will make use of the strength properties obtained from the results of these tests and apply them using two commonly used bearing capacity analyses. The first model is the Meyerhof and Hanna Method which considers the track as a continuous footing over a layered system. This model considers two modes of failure; punching of an individual sleeper, and track system bearing. The second model applied is the slope stability method, which uses a two-dimensional limit equilibrium approach and the method of slices to determine a factor of safety against slope stability. This analysis is commonly performed using various software programs. In this study, SLOPE/W from the GeoStudio software package is utilized for analysis. The factors of safety resulting from the bearing capacity analysis using these two methods will be compared for each of the test configurations performed, which will help to confirm the results of the analyses. Since the Mohr-Coulomb strength properties change with the degree of fouling and the water content of the ballast, it is expected that this will have some effect on the bearing capacity of the track substructure. The results of these analyses showing the effects of water content and fouling of ballast on overall track substructure bearing capacity are presented in this paper.
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Shahin, Mohamed A., and Buddhima Indraratna. "Parametric Study on the Resilient Response of Ballasted Railway Track Substructure Using Numerical Modeling." In GeoCongress 2006. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40803(187)85.

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Fu, Qinghong, Xianhua Chen, Gang Xu, and Fengmin Sun. "Performance Evaluation of SBS+CR Composite Modified Asphalt Binder and Mixture for Railway Substructure." In 19th COTA International Conference of Transportation Professionals. Reston, VA: American Society of Civil Engineers, 2019. http://dx.doi.org/10.1061/9780784482292.083.

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Caorsi, S., G. Cevini, F. Burro, M. Sciotti, and S. Sorge. "An innovative on-board processor for the real-time GPR monitoring of railway substructure conditions." In 2007 4th International Workshop on, Advanced Ground Penetrating Radar. IEEE, 2007. http://dx.doi.org/10.1109/agpr.2007.386568.

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